Engine swap for a 73' 620

[Fuelrags]

Hey guys, So what's the scoop....Is there an easy,inexpensive bolt-in upgrade Engine Swap for my 73' 620 with out a lot of headaches?

[datzenmike]

Easy... L20B came in the '75-'79 620 so will fit perfectly and the stock tranny will bolt up. The differences are that it's 3/4" taller... no biggie on a truck. The exhaust manifold is a single large pipe and not a double into a collector like yours. You will need the L20B flywheel and clutch, yours won't fit. Get the motor mounts too just in case. Years ago I put an L20B into a 521 and I don't remember any problems. Easy... no headaches. 10-15 more horse and more torque.

[dat521gatherer]

make sure if you get a l2ob out of a car that you swap the oil pans. just make sure you have a truck oil pan. i got my l20b from a 80 720 and put it in my 72 521.:D

 

l18 is a direct bolt in also.

[banzai510(hainz)]

use your oil pan and motor mounta that are in tha truck already.

Never heard the car pan thing as those pans will not clear the streering x arm

 

ck the oil pick up if different

[datzenmike]

make sure if you get a l2ob out of a car that you swap the oil pans. just make sure you have a truck oil pan. i got my l20b from a 80 720 and put it in my 72 521.:D

 

That will only work with an '80 2wd oil pan if you find one.